EPSP synthase flexibility is determinant to its function: computational molecular dynamics and metadynamics studies.

Area of Science:

• Biochemistry
• Structural Biology
• Computational Biology

Background:

• Enzyme flexibility is critical for biological processes like protein binding.
• EPSP synthase requires significant conformational changes to bind ligands.
• The structural plasticity of Mycobacterium tuberculosis EPSP (MtEPSP) synthase remains underexplored.

Purpose of the Study:

• To investigate the conformational flexibility of MtEPSP synthase.
• To understand how flexibility influences MtEPSP synthase function.
• To identify regions governing conformational transitions for drug design.

Main Methods:

• Classical and replica-exchange metadynamics simulations were employed.
• Analysis focused on identifying distinct conformational states.
• Hydrophobic regions involved in state transitions were pinpointed.

Main Results:

• Five conformational clusters were identified: two open, one ajar, and two closed states.
• Three key hydrophobic regions were found to mediate transitions between conformations.
• The study elucidated the role of hydrophobic interactions in modulating MtEPSP synthase flexibility.

Conclusions:

• Hydrophobic regions are crucial modulators of MtEPSP synthase flexibility.
• Understanding these dynamic features is important for targeting MtEPSP synthase in drug discovery.
• The findings provide insights into the functional implications of enzyme plasticity.